Python，0b

变量命名赋值规则

 1 # variables - placeholders for important values
 2 # used to avoid recomputing values and to
 3 # give values names that help reader understand code
 4 
 5 
 6 # valid variable names - consists of letters, numbers, underscore (_)
 7 # starts with letter or underscore
 8 # case sensitive (capitalization matters)
 9 
10 # legal names - ninja, Ninja, n_i_n_j_a
11 # illegal names - 1337, 1337ninja
12 
13 # Python convention - multiple words joined by _
14 # legal names - elite_ninja, leet_ninja, ninja_1337
15 # illegal name 1337_ninja
16 
17 
18 
19 # assign to variable name using single equal sign =
20 # (remember that double equals == is used to test equality)
21 
22 # examples 
23 
24 my_name = "Joe Warren"
25 print my_name
26 
27 my_age = 51
28 print my_age
29 
30 # birthday - add one
31 
32 #my_age += 1
33 print my_age
34 
35 
36 # the story of the magic pill
37 
38 magic_pill = 30
39 print my_age - magic_pill
40 
41 my_grand_dad = 74
42 
43 print my_grand_dad - 2 * magic_pill
44 
45 
46 
47 
48 
49 
50 
51 
52 
53 # Temperature examples
54 
55 # convert from Fahrenheit to Celsuis
56 # c = 5 / 9 * (f - 32)
57 # use explanatory names
58 
59 temp_Fahrenheit = 212
60 
61 temp_Celsius = 5.0 / 9.0 * (temp_Fahrenheit - 32)
62 
63 print temp_Celsius
64 
65 # test it! 32 Fahrenheit is 0 Celsius, 212 Fahrenheit is 100 Celsius
66 
67 
68 # convert from Celsius to Fahrenheit
69 # f = 9 / 5 * c + 32
70 
71 temp_Celsius = 100
72 
73 temp_Fahrenheit = 9.0 / 5.0 * temp_Celsius + 32
74 
75 print temp_Fahrenheit
76 
77 
78 # test it!